JPH0223670Y2 - - Google Patents
Info
- Publication number
- JPH0223670Y2 JPH0223670Y2 JP985885U JP985885U JPH0223670Y2 JP H0223670 Y2 JPH0223670 Y2 JP H0223670Y2 JP 985885 U JP985885 U JP 985885U JP 985885 U JP985885 U JP 985885U JP H0223670 Y2 JPH0223670 Y2 JP H0223670Y2
- Authority
- JP
- Japan
- Prior art keywords
- shank
- bit
- holder
- casing pipe
- bit body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004576 sand Substances 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Component Parts Of Construction Machinery (AREA)
- Earth Drilling (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、地盤の掘削穿孔に使用されるケーシ
ングオーガのカツタービツト、特に、ケーシング
パイプに対して着脱自在であつて、しかも、保持
性に優れるカツタービツトに関する。[Detailed description of the invention] [Field of industrial application] The present invention is a cutter bit of a casing auger used for drilling holes in the ground, and in particular, a cutter bit that is detachable from the casing pipe and has excellent retention properties. Regarding Katsturbit.
大径長尺の円筒ケーシング先端（下端面）に複
数個のカツタービツトを等間隔に取付け、それを
回転しつゝ地盤、岩盤を穿孔掘進するケーシング
オーガでは、ケーシングパイプへのカツタービツ
トの取付けを通常溶接によつて行つている。
In the case of a casing auger, in which multiple cutter bits are attached at equal intervals to the tip (lower end surface) of a large diameter and long cylindrical casing, and the cutter bits are rotated to drill through the ground or rock, the cutter bits are usually attached to the casing pipe by welding. I am going by.
しかしながら、溶接ビツトは、摩耗或いは欠損
したときの再生、交換が非常に面倒で時間がかゝ
る。即ち、摩耗ビツトの再研磨、欠損ビツトの交
換は、ケーシングパイプへの溶接部を溶断し、傷
んだビツトを一旦取外してからでないと行えず、
また、次に使うビツトの溶接に当つて、母材溶断
部の肉盛り補修も必要になる。 However, when a welding bit is worn out or damaged, it is very troublesome and time-consuming to regenerate or replace it. In other words, re-grinding of worn bits and replacement of damaged bits cannot be carried out unless the welded part to the casing pipe is fused and the damaged bit is removed.
Also, when welding the next bit to be used, it is necessary to repair the welded part of the base metal.
なお、螺旋翼先端にビツトを付けた一般的なロ
ツクアースオーガではボデイの凹部に楔をボルト
止めし、その楔による締付力でビツトを固定する
等の方法（例えば実開昭48−58587号）でビツト
の着脱を可能ならしめることが行われているが、
この種の構造は、ボデイ形状の異なるケーシング
オーガには利用できない。 For general rock earth augers with a bit attached to the tip of the spiral blade, a wedge is bolted to the recess of the body, and the bit is fixed by the tightening force of the wedge (for example, Utility Model Application No. 58587/1983). ), it has been made possible to attach and detach bits.
This type of structure cannot be used for casing augers with different body shapes.
本考案は、上述の問題を無くすため、保持性に
優れた着脱式のケーシングオーガ用カツタービツ
トを提案するものである。 In order to eliminate the above-mentioned problems, the present invention proposes a detachable cutter bit for a casing auger that has excellent retention properties.
本考案は、カツタービツトを、ケーシングオー
ガのケーシングパイプ先端に溶接するホルダとそ
のホルダの蟻溝に挿入係止させてボルト止めする
ビツト本体とに分けることによつて消耗するビツ
ト本体の着脱を可能ならしめると共に、ビツト本
体とホルダとの間の隙間に掘削により生じた細粒
土砂を積極的に取込む構成としてビツト本体の保
持力増強と止着ボルトの保護を計つており、中で
も細粒土砂を有効利用するところに斬新な思想の
見られるものである。
The present invention is to separate the cutter bit into a holder that is welded to the tip of the casing pipe of the casing auger, and a bit body that is inserted into the dovetail groove of the holder and bolted, thereby making it possible to attach and detach the bit body that wears out. At the same time, the structure is designed to actively capture fine earth and sand generated by excavation into the gap between the bit body and the holder, increasing the holding power of the bit body and protecting the fastening bolt. Innovative thinking can be seen in the way it is used effectively.
以下、添付図に基いてその詳しい構成を説明す
る。 The detailed configuration will be explained below based on the attached drawings.
第１図及び第２図に示すように、ビツト本体１
は、シヤンク２の先端に超硬合金等の硬質材料か
ら成る切刃チツプ３を鑞付け等によつて止着した
もので、そのシヤンク２の後方部は、１側面２ａ
と前面２ｂとの交差部及び１側面２ａと後面２ｃ
の交差部にシヤンクの途中から上面２ｄに至る切
欠溝４を付して横断視の断面形状を凸形状にして
ある。また、切欠溝の付された個所においてシヤ
ンク２には開口が大径となる段付きのボルト穴５
を１側面２ａから他側面２ｅに貫通して設けてあ
る。 As shown in Figures 1 and 2, the bit body 1
In this example, a cutting tip 3 made of a hard material such as cemented carbide is attached to the tip of a shank 2 by brazing or the like, and the rear part of the shank 2 is attached to one side surface 2a.
and the intersection of the front surface 2b and the first side surface 2a and the rear surface 2c
A notched groove 4 extending from the middle of the shank to the upper surface 2d is provided at the intersection of the shank to make the cross-sectional shape in a cross-sectional view convex. In addition, the shank 2 has a stepped bolt hole 5 with a large diameter opening at the location where the notch groove is provided.
is provided so as to penetrate from one side surface 2a to the other side surface 2e.
一方、ビツトホルダ６は、横断視形状がビツト
本体のシヤンクの凸形状部と相似形でシヤンク寸
法より若干小さい軸方向蟻溝７を、側面６ａ側に
おいて下面６ｂに開放して設け、さらにシヤンク
のボルト穴と対応する位置にねじ穴８を設けた構
成とされ、上壁６ｃでシヤンク上面２ｄを、対向
した前後の壁６ｄ，６ｅでシヤンクの前後面２
ｂ，２ｃを、側壁６ｆでシヤンクの他側面２ｅ
を、１側面６ａ側に残された突条６ｇと止着ボル
ト９（１０はスプリングワツシヤ）とでシヤンク
の１側面２ａ側を各々支持するようにしてある。
但し、その支持は、一部の個所では密着して行わ
れるが、他はシヤンク２の外面と蟻溝７の内面と
の間の隙間Ｇに流入充填される細粒土砂を介して
行われる。 On the other hand, the bit holder 6 has an axial dovetail groove 7 which is similar in cross-sectional shape to the convex shape of the shank of the bit body and is slightly smaller than the shank dimension, and is open on the lower surface 6b on the side surface 6a side. A screw hole 8 is provided at a position corresponding to the hole, and the upper wall 6c serves as the upper surface 2d of the shank, and the opposing front and rear walls 6d and 6e serve as the front and rear surfaces 2 of the shank.
b, 2c on the other side 2e of the shank with the side wall 6f.
The one side surface 2a side of the shank is supported by the protrusion 6g left on the one side surface 6a side and the fixing bolt 9 (10 is a spring washer).
However, the support is carried out in some places in close contact, but in other parts it is carried out through fine-grained earth and sand flowing into and filling the gap G between the outer surface of the shank 2 and the inner surface of the dovetail groove 7.
即ち、図のようにビツト本体とボルダを組合せ
る場合、両者間の隙間に土砂粉が侵入しないよう
隙間の開口部を密閉するのが普通であるが、本考
案では、ホルダの下面側に（シヤンク側でもよ
い）蟻溝７を拡開させる斜面１１を付して隙間Ｇ
の開口を逆に拡大しており、このため、隙間Ｇに
は掘削時に生じた細粒土砂がビツトの移動に伴な
つて流入し、掘削圧により硬くプレスされて充填
される。この土砂粉の流入充填は、１回目5m程
度の掘進によつて完了し、この時点では既にボル
ト９を外してもホルダ内のビツト本体が全く動か
ない状態になることが実験の結果確認されてお
り、ビツト本体の掘削時のガタツキ防止につなが
る。 That is, when assembling the bit body and the boulder as shown in the figure, it is normal to seal the opening of the gap to prevent dirt from entering the gap between the two, but in the present invention, the bottom side of the holder is (Can also be on the shank side) A slope 11 that widens the dovetail groove 7 is attached to the gap G.
On the contrary, the opening of the gap G is enlarged, so that the fine earth and sand generated during excavation flows into the gap G as the bit moves, and is pressed hard by the excavation pressure and filled. This inflow of earth and sand powder is completed after the first excavation of about 5 m, and it has been confirmed through experiments that at this point the bit body in the holder does not move at all even if the bolt 9 is removed. This prevents the bit body from rattling during excavation.
つまり、本考案のビツトは、第３図に示すよう
に、ケーシングパイプＡの先端にパイプの内面側
と外面側を掘削する勝手違いの２種が周方向に定
間隔で千鳥状に装着され、掘削時に第１図のP1
方向の押付力、P2方向の切削力、第２図のP3及
びそれに対向したP4方向の側圧を受けるが、P1
の力はホルダの上壁６ｃに、P4の側圧は側壁６
ｆに直接受け止められ、一方、P2の切削力は充
填土砂を介して前後の壁６ｄ，６ｅに、P3の力
は同様に土砂を介して突条６ｇに受け止められ
る。また、これによつてP3の力のボルト９への
伝達が回避され、そのボルトの緩みと損傷が防止
される。 In other words, in the bit of the present invention, as shown in Fig. 3, two different types of bits are installed at the tip of the casing pipe A in a staggered manner at regular intervals in the circumferential direction, drilling the inner and outer sides of the pipe. P 1 in Figure 1 during excavation
It receives a pressing force in the direction P2, a cutting force in the P2 direction, and a lateral pressure in the P3 direction and the opposing P4 direction in Fig. 2, but P1
The force of P4 is applied to the upper wall 6c of the holder, and the side pressure of P4 is applied to the side wall 6c of the holder.
On the other hand, the cutting force of P 2 is received by the front and rear walls 6d and 6e through the filling earth and sand, and the force of P 3 is similarly received by the protrusion 6g through the earth and sand. This also avoids the transmission of the force P 3 to the bolt 9, preventing loosening and damage to that bolt.
なお、ビツト本体の刃形は、特に限定されな
い。また、蟻溝７とそれに挿入するシヤンクの一
部は台形の断面形状であつてもよい。 Note that the blade shape of the bit body is not particularly limited. Further, the dovetail groove 7 and a portion of the shank inserted therein may have a trapezoidal cross-sectional shape.
さらに、隙間Ｇ内の固化土砂は、圧縮には強い
が衝撃には弱く、従つて、ハンマー等で衝撃を与
えてやれば容易に剥落し、ビツト本体の取外しに
支障を来たすことがない。 Further, the solidified earth and sand in the gap G is strong against compression but weak against impact, so if an impact is applied with a hammer or the like, it will easily fall off and will not interfere with the removal of the bit body.
第１図の符号１２は、必要に応じて設ける硬化
肉盛部、第２図のＢは溶接部である。 Reference numeral 12 in FIG. 1 is a hardened build-up portion provided as necessary, and B in FIG. 2 is a welded portion.
以上の通り、本考案のカツタービツトは、ビツ
ト本体を容易に着脱でき、また、ホルダにボルト
止めした本体は、ホルダの蟻溝内面との間に積極
的に取込まれる細粒土砂によつてガタツキ無く保
持され、安定した掘削が可能であると共に部品の
傷み等も防止される。
As mentioned above, in the cutter bit of the present invention, the bit body can be easily attached and detached, and the body bolted to the holder does not rattle due to fine earth and sand that is actively taken in between it and the inner surface of the dovetail groove of the holder. This allows stable excavation and prevents damage to parts.
また、ビツト本体とホルダ間の隙間は、加工精
度を下げることによつて作り出せるので製作も容
易になる。 Further, since the gap between the bit body and the holder can be created by lowering the machining accuracy, manufacturing becomes easier.
第１図は、本考案のカツタービツトの一例を示
す側面図、第２図はその−線に沿つた断面
図、第３図はケーシングパイプへの止着状態を示
す断面図である。
１……ビツト本体、２……シヤンク、３……切
刃チツプ、４……切欠溝、５……ボルト穴、６…
…ビツトホルダ、７……蟻溝、８……ねじ穴、９
……ボルト、１０……スプリングワツシヤ、１１
……斜面。
FIG. 1 is a side view showing an example of the cutter bit of the present invention, FIG. 2 is a cross-sectional view taken along the - line, and FIG. 3 is a cross-sectional view showing how it is fixed to a casing pipe. 1... Bit body, 2... Shank, 3... Cutting blade tip, 4... Notch groove, 5... Bolt hole, 6...
...Bit holder, 7...Dovetail groove, 8...Screw hole, 9
...Bolt, 10...Spring washer, 11
...Slope.
Claims (1)
中から後端迄の横断視形状を１側面の巾が狭くな
る凸形状とし、かつその凸形状部に１側面から他
側面に抜ける段付きのボルト穴を設けたビツト本
体と、シヤンクの凸形状部と相似形でシヤンク寸
法よりも若干大きな軸方向蟻溝を１側面側におい
て下面に開放させて設けたビツトホルダと、上記
ボルト穴に通すシヤンクとビツト本体の止着ボル
トとで構成され、上記シヤンクとケーシングパイ
プの下端部に溶接するビツトホルダ間の間隙がビ
ツトホルダの下面側開口部において拡大している
ケーシングオーガ用カツタービツト。 The cross-sectional shape from the middle of the shank to the rear end facing in the axial direction of the casing pipe is a convex shape with a narrower width on one side, and a stepped bolt hole is provided in the convex portion to pass from one side to the other side. A bit body, a bit holder having an axial dovetail groove similar to the convex shape of the shank and slightly larger than the shank dimension opened at the bottom on one side, a shank to be passed through the bolt hole, and a stop of the bit body. A cutter bit for a casing auger, the cutter bit being comprised of a bolt and a bit holder welded to the lower end of the shank and the casing pipe, and the gap between the shank and the bit holder being welded to the lower end of the casing pipe is widened at the lower opening of the bit holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP985885U JPH0223670Y2 (en) | 1985-01-24 | 1985-01-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP985885U JPH0223670Y2 (en) | 1985-01-24 | 1985-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61125586U JPS61125586U (en) | 1986-08-07 |
| JPH0223670Y2 true JPH0223670Y2 (en) | 1990-06-27 |
Family
ID=30490476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP985885U Expired JPH0223670Y2 (en) | 1985-01-24 | 1985-01-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0223670Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5249667B2 (en) * | 2008-08-01 | 2013-07-31 | 株式会社技研製作所 | Cutting tools |
| JP6547196B2 (en) * | 2017-08-25 | 2019-07-24 | エポコラム機工株式会社 | Drilling blade |
-
1985
- 1985-01-24 JP JP985885U patent/JPH0223670Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61125586U (en) | 1986-08-07 |
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